Document Detail

Scalp topography of mechanically and electrically evoked somatosensory potentials in man.
MedLine Citation:
PMID:  6198164     Owner:  NLM     Status:  MEDLINE    
Scalp topography of somatosensory evoked potentials following mechanical (SEPs(M)) and electrical (SEPs(E)) stimulation of the left middle finger was investigated with linked ear reference in 21 normal young adults. A small plastic ball (touch) or needle (pain) was used for the mechanical stimulation. With mechanical stimulation, at least 3 positive and 3 negative potentials (P19(M), N24(M), P29(M), N36(M), P49(M) and N61(M] were found in the post-rolandic area contralateral to the stimulation. The wave form in SEPs(M) was similar to those in SEPs(E), but the peak latency of each component in SEPs(M) was 1-4 msec longer than that in SEPs(E). Earlier components such as P19(M), N24(M) and P29(M) were not as clearly recognized as corresponding components in SEPs(E). However, the wave form recorded on the hemisphere ipsilateral to the stimulation or in the frontal area contralateral to the stimulation showed a greater difference from subject to subject. P19(M), N24(M) and P29(M) correlated positively both with arm length and height of the subject. There was no significant difference of the wave form between the linked ear reference and the bipolar (C4-Fz) derivation. Wave form of SEPs(M) by needle stimulation did not significantly differ from that by plastic ball stimulation.
R Kakigi; H Shibasaki
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Electroencephalography and clinical neurophysiology     Volume:  59     ISSN:  0013-4694     ISO Abbreviation:  Electroencephalogr Clin Neurophysiol     Publication Date:  1984 Feb 
Date Detail:
Created Date:  1984-03-23     Completed Date:  1984-03-23     Revised Date:  2008-09-09    
Medline Journal Info:
Nlm Unique ID:  0375035     Medline TA:  Electroencephalogr Clin Neurophysiol     Country:  IRELAND    
Other Details:
Languages:  eng     Pagination:  44-56     Citation Subset:  IM    
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MeSH Terms
Brain / physiology
Brain Mapping*
Electric Stimulation
Electroencephalography / methods*
Evoked Potentials, Somatosensory*
Physical Stimulation

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